津波を受けるGRS一体橋梁の模型実験  [in Japanese] MODEL TEST ON GRS-INTEGRAL BRIDGE AFFECTED BY TUNAMI  [in Japanese]

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Abstract

2011年東北地方太平洋沖地震による甚大な被害の大半は,巨大津波によるものであった.これ対する防災策 として,沿岸防潮堤だけではなく鉄道や道路の盛土から構成された多重防御施設の導入などの複合的な減災対 策の実施が提案されている.本研究では,道路・鉄道盛土に導入される可能性のあるGeosynthetic-Reinforced Soil(GRS)一体橋梁の耐津波性能を室内小型模型実験で検討した.開水路内に模型を作製し,段波によって 津波を再現した.GRS一体橋梁の押波に対する桁,橋台の安定性を確認できた.

Most of the extensive damage caused by the 2011 off the Pacific coast of Tohoku Earthquake was due to the huge tsunami. With more than 340 bridges, either the girder was lost or the approach fill was washed away or both. A series of small model tests were performed to evaluate the stability against tsunami of the conventional type bridge, for which the girder is placed on the top of the abutments via bearings with unreinforced backfill, and Geosynthetic- Reinforced Soil (GRS) Integral Bridge, for which the girder is integrated to the facings and the backfill is reinforced with geogrid layers. It is shown that GRS IBs are much more stable against over-topping tsunami current.

Journal

  • Geosynthetics Engineering Journal

    Geosynthetics Engineering Journal 28(0), 251-258, 2013

    Japan Chapter of International Geosynthetics Society

Codes

  • NII Article ID (NAID)
    130004713843
  • Text Lang
    JPN
  • ISSN
    1344-6193
  • NDL Article ID
    026375048
  • NDL Call No.
    Z16-1575
  • Data Source
    NDL  J-STAGE 
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